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Pre-Cambrian

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Precambrian - Wikipedia
The Precambrian is an informal unit of geologic time, subdivided into three eons (Hadean, Archean, Proterozoic) of the geologic time scale. en.wikipedia.org
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Precambrian | Life, Climate, & Facts - Britannica
Precambrian, period of time extending from about 4.6 billion years ago (the point at which Earth began to form) to the beginning of the Cambrian Period, 541 ... www.britannica.com
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2.7: Precambrian Eon - Geosciences LibreTexts
The Precambrian encompassed all of early Earth history and rocks from that time preserve evidence of the evolution of life forms on a microbial level. geo.libretexts.org
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Pre-Cambrian
Pre-ˈCambrian, a. Geol. Also pre-Cambrian, Precambrian. [pre- B. 1.] Of, pertaining to, or designating the time before the beginning of the Cambrian period and Palæozoic era, present-day rocks of which are marked by an almost complete absence of fossils. Also ellipt., the Pre-Cambrian rocks or perio... Oxford English Dictionary
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Precambrian Time Information and Prehistoric Facts
The Precambrian is the earliest of the geologic ages, which are marked by different layers of sedimentary rock. Laid down over millions of years, these rock ... www.nationalgeographic.com
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[PDF] Precambrian Time— The Story of the Early Earth
Precambrian time spans almost nine- tenths of Earth history, from the formation of the Earth to the dawn of the Cambrian Period. It represents time so vast and ... pubs.usgs.gov
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William Trevelyan Harry
Granite Intrusions, SW Greenland (1960) Gneisses of the Kipawa District, Western Quebec (1961) The Nunarssuit Intrusive Complex, South Greenland (1963) The Pre-Cambrian wikipedia.org
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The Precambrian (U.S. National Park Service)
The Precambrian was the "Age of Early Life." During the Precambrian, continents formed and our modern atmosphere developed, while early life evolved and ... www.nps.gov
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Precambrian - Natural History Museum |
The Precambrian encompasses nearly 90% of the history of the Earth and around a third of the history of the Universe. natmus.humboldt.edu
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The Divisions of Precambrian Time
Nearly 4 thousand million years passed after the Earth's inception before the first animals left their traces. This stretch of time is called the Precambrian. ucmp.berkeley.edu
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Precambrian Earth: Co-evolution of life and geodynamics
The Precambrian covers 80% of the history the Earth. In this timespan, the Earth developed from an anaerobic planet to the oxygenic planet dominated by Wilson- ... www.sciencedirect.com
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Pebidian
Pebidian, a. Geol. (pəˈbɪdɪən) [See quot. 1877 and -an.] Epithet of a thick sequence of volcanic rocks of Pre-Cambrian age exposed in Preseli, SW Wales. Also absol.1877 H. Hicks in Q. Jrnl. Geol. Soc. XXIII. 230, I propose now to divide the Pre-Cambrian rocks [in the vicinity of St. David's] into tw... Oxford English Dictionary
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Roland Duer Irving
His specialty was the micro-petrography of the fragmental rocks and crystalline schists, and pre-Cambrian stratigraphy and the genesis of some of the so-called US Geological Survey Bulletin No. 23 (1885) "The Classification of the Early Cambrian and Pre-Cambrian Formations" US Geological Survey (1886) The Greenstone wikipedia.org
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Archæan
Archæan, a. Geol. (ɑːˈkiːən) [f. Gr. ἀρχαῖ-ος ancient + -an.] Of or pertaining to crystalline rocks of Pre-Cambrian age (see quots.). Also ellipt. as n.1872 Dana in Amer. Jrnl. Sci. Apr. 253, I propose to use for the Azoic era and its rocks the general term Archæan. 1881 C. Fish in Pop. Sc. Monthly ... Oxford English Dictionary
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Dan Needles
List of Selected Works Books "With Axe and Flask, The History of Persephone Township from the Pre-Cambrian Times to the Present", Macfarlane, Walter Last Christmas Turkey", a musical adaptation scored by Clive VanderBurgh (2016) Awards With Axe and Flask, The History of Persephone Township from Pre-Cambrian wikipedia.org
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